KR101633673B1 - Air compressor having a bearing vibration absorption structure - Google Patents

Air compressor having a bearing vibration absorption structure Download PDF

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Publication number
KR101633673B1
KR101633673B1 KR1020150115348A KR20150115348A KR101633673B1 KR 101633673 B1 KR101633673 B1 KR 101633673B1 KR 1020150115348 A KR1020150115348 A KR 1020150115348A KR 20150115348 A KR20150115348 A KR 20150115348A KR 101633673 B1 KR101633673 B1 KR 101633673B1
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KR
South Korea
Prior art keywords
bearing
motor housing
coupled
rear side
rotary shaft
Prior art date
Application number
KR1020150115348A
Other languages
Korean (ko)
Inventor
임재만
이홍영
Original Assignee
주식회사 뉴로스
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Publication date
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Priority to KR1020150115348A priority Critical patent/KR101633673B1/en
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Publication of KR101633673B1 publication Critical patent/KR101633673B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/0467—Spherical bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/44—Centrifugal pumps

Abstract

The present invention relates to an air compressor of a bearing vibration absorption structure. According to the air compressor, a rotational shaft of a rotor is coupled to be rotated to a housing by a bearing. Provided is the air compressor of a bearing vibration absorption structure, applying an air foil journal bearing instead of a ball bearing or installing a damping means to a radial outer side of the ball bearing of a rear side which is the opposite side of the front side where an impeller is coupled to the rotational shaft to absorb vibration and an impact applied to the bearing by rotation of the rotational shaft in order to increase durability of the bearing.

Description

[0001] The present invention relates to an air compressor having a bearing vibration absorbing structure,

[0001] The present invention relates to an air compressor of a bearing vibration absorbing structure, and more particularly to an air compressor in which a rotary shaft of a rotor is coupled to a housing by a bearing so as to be rotatable, To an air compressor of a bearing vibration absorbing structure capable of improving durability of a bearing.

The air compressor is a device for compressing and supplying air. The compressor has a turbo compressor that rotates the impeller at a high speed by using the rotational force of the motor to introduce the air into the compressor, and blows the air. The turbo compressor, (turbo blower).

For example, as shown in FIG. 1, the air compressor includes an air inlet through which external air flows in front, and the air can be compressed by the impeller 10 coupled to the rotating shaft 20 and rotated. The motor 30 is disposed inside the case 40 and the motor 30 is connected to the stator 31 wound with the coil 30, (Stator) and a rotor 33 (rotor) configured to rotate inside the stator 31. The impeller 20 is coupled to the front side of the rotary shaft 20 coupled to the rotor 33 and is coupled to the rotary shaft 32 to be rotatably coupled to the motor housing 30, And a magnet (34).

As shown here, the rotary shaft 20 is coupled to the case 40 by the ball bearings 61 and 63 so as to be rotatable and supported by the rotary shaft or by an airfoil journal bearing, which is a non-contact type bearing, . That is, the outer side of the bearing is tightly coupled to the case 40, and the inner side of the bearing is tightly coupled to the rotary shaft 20. [

However, when both the front side and the rear side, which are both sides of the rotary shaft 20, are supported by the ball bearings 61 and 63 as described above, the vibration and impact of the ball bearing can not be absorbed, When both the front and rear sides of the rotary shaft 20 are supported by the airfoil journal bearings, vibration and impact are generated due to the characteristics of the airfoil bearing that floats and rotates in the air, thereby lowering the durability of the bearing.

KR 10-2014-0135383 A (2014.11.26.)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an air compressor in which a rotary shaft of a rotor is coupled to a housing by a bearing so as to be rotatable, And to provide an air compressor of a bearing vibration absorbing structure capable of absorbing shocks, thereby improving the durability of the bearing.

According to an aspect of the present invention, there is provided an air compressor of a bearing vibration absorbing structure, comprising: a motor housing having a hollow interior; A stator installed inside the motor housing and fixed to the motor housing; A rotor disposed inside the stator and coupled to a rotating shaft; An impeller coupled to the front of the rotating shaft; And a pair of journal bearings coupled between the motor housing and the rotation shaft, the pair of journal bearings being rotatably supported by the rotation shaft, and spaced apart from the front side and the rear side of the rotation shaft; The journal bearings are formed of a ball bearing, and are damped by a radial outer surface of a ball bearing disposed on the rear side of the rotary shaft and interposed between the outer surface of the motor housing and absorbing vibrations and shocks .

The damping device may further include damping means disposed between the radially outer side surface of the ball bearing disposed on the front side of the rotary shaft and the inner side surface of the motor housing to closely contact with each other to absorb vibrations and shocks.

The damping means may include a plurality of resilient bumps disposed along the circumferential direction of the inner circumferential surface of the bearing mount portion of the motor housing and convexed inward in the radial direction, And is a bump foil which is fixed in combination.

In addition, a plate-shaped thrust runner is formed on the rear side of the ball bearing arranged on the rear side of the rotating shaft, and a plate-like thrust runner is formed perpendicularly to the rotating shaft. Between the front side of the thrust runner and the motor housing and between the rear side surface of the thrust runner and the motor housing And each of the airfoil thrust bearings is tightly coupled.

The air compressor of the bearing vibration absorbing structure of the present invention comprises: a motor housing having a hollow interior; A stator installed inside the motor housing and fixed to the motor housing; A rotor disposed inside the stator and coupled to a rotating shaft; An impeller coupled to the front of the rotating shaft; And a pair of journal bearings coupled between the motor housing and the rotation shaft, the pair of journal bearings being rotatably supported by the rotation shaft, and spaced apart from the front side and the rear side of the rotation shaft; The journal bearing disposed on the front side of the rotary shaft is formed of a ball bearing and the journal bearing disposed on the rear side of the rotary shaft is formed of an airfoil journal bearing.

The damping device may further include damping means disposed between the radially outer side surface of the ball bearing disposed on the front side of the rotary shaft and the inner side surface of the motor housing to closely contact with each other to absorb vibrations and shocks.

The airfoil journal bearing may include a bearing housing formed with a hollow in which the rotating shaft is disposed, and both sides of the bearing housing are opened in the width direction; A bump foil formed on the inner side of the bearing housing and formed along the circumferential direction and having a plurality of elastic bumps convex radially inwardly spaced apart from each other along the circumferential direction and having one side fixed to the bearing housing; And a top foil provided on the inner side of the bump foil and formed along the circumferential direction and having one side fixedly coupled to the bearing housing; And a control unit.

In addition, a thrust runner is formed on the rear side of the airfoil journal bearing disposed on the rear side of the rotary shaft and perpendicular to the rotary shaft. The thrust runner is disposed between the front side of the thrust runner and the motor housing and between the rear side surface of the thrust runner and the motor housing And the airfoil thrust bearings are closely attached to each other.

The air compressor of the bearing vibration absorbing structure of the present invention is capable of absorbing vibrations generated from the bearings and vibrations and shocks acting on the bearings, thereby improving the durability of the bearings.

1 is a sectional view showing a conventional air compressor (air blower).
2 is a front sectional view showing an air compressor of a bearing vibration absorbing structure according to a first embodiment of the present invention;
3 is a cross-sectional view taken along line AA 'in Fig.
Figs. 4 and 5 are front sectional views showing modified embodiments of an air compressor of a bearing vibration absorbing structure according to a first embodiment of the present invention; Fig.
6 is a front sectional view showing an air compressor of a bearing vibration absorbing structure according to a second embodiment of the present invention.
7 is a cross-sectional view taken along line BB 'in Fig. 6;
8 and 9 are front sectional views showing modified embodiments of an air compressor of a bearing vibration absorbing structure according to a second embodiment of the present invention;

Hereinafter, the air compressor according to the present invention will be described in detail with reference to the accompanying drawings.

[Example 1]

FIG. 2 is a front sectional view showing an air compressor of a bearing vibration absorbing structure according to a first embodiment of the present invention, and FIG. 3 is a sectional view in AA 'direction of FIG.

As shown in the drawings, the air compressor 1000 of the bearing vibration absorbing structure according to the first embodiment of the present invention includes: a motor housing 100 having a hollow interior; A stator 200 provided inside the motor housing 100 and fixedly coupled to the motor housing 100; A rotor 300 provided inside the stator 200 and coupled to the rotating shaft 310; An impeller 400 coupled to the front of the rotary shaft 310; And a pair of journal bearings (not shown) disposed between the motor housing 100 and the rotary shaft 310 and spaced apart from the front and rear sides of the rotary shaft 310, 500); And the journal bearings 500 are formed of a ball bearing 510. The journal bearings 500 are disposed on the rear side of the rotation shaft 310 and radially outwardly of the ball bearings 510, And damping means 600 interposed between and closely in contact with the inner surface to absorb vibrations and impacts.

The air compressor 1000 having the bearing vibration absorbing structure according to the present invention may be composed of an impeller 400 for compressing air and a motor for driving the impeller 400, The impeller 400 can be coupled and rotated.

The impeller 400 is coupled to the left front side of the rotary shaft 310. The impeller 400 includes an inlet 411 through which external air is sucked and an impeller case 410 through which the outlet 412 is compressed, And the impeller case 410 can be coupled to the motor housing 100. [0031] As shown in FIG. The motor housing 100 may have a hollow stator 200 wound around the motor housing 100 and the stator 200 may be coupled to the inner circumferential surface of the motor housing 100 . The rotor 300 may be spaced apart from the inside of the stator 200 and the stator 200 may be formed in a shape in which the rotating shaft 310 is coupled to penetrate the magnet 320 as a permanent magnet.

The rotary shaft 310 is coupled to both sides of the motor housing 100 by a journal bearing 500 and is rotatable. The rotary shaft 310 is coupled to both sides of the rotary shaft 310 of the journal bearing 500, The bearings 500 can be disposed apart from each other. A bearing mounting portion 110 may be formed on both sides of the motor housing 100 so that the journal bearing 500 can be coupled to the bearing housing 110. The bearing mounting portion 110 and the rotary shaft 310 are formed with a step, Can be determined.

Here, the journal bearings 500 may be formed of a ball bearing 510, and may be formed of a radial ball bearing to support a radial load. The damping means 600 is disposed between the radial outer surface of the ball bearing 510 disposed on the rear side of the rotating shaft 310 (the opposite side to which the impeller is coupled) and the bearing mounting portion 110 of the motor housing 100, And can be brought into close contact with each other. At this time, the damping means 600 may be formed of a material or a shape capable of absorbing elastic material or vibration and impact. That is, the damping means 600 is tightly coupled between the outer circumferential surface of the outer ring of the rear ball bearing 510 and the bearing mounting portion 110 so that vibration and shock acting on the ball bearing 510 by the damping means 600 are reduced .

Thus, the air compressor of the bearing vibration absorbing structure of the present invention is capable of absorbing vibrations generated from the bearings and vibrations and shocks acting on the bearings, thereby improving the durability of the bearings.

The damping means 600 interposed between the radially outer side surface of the ball bearing 510 disposed on the front side of the rotary shaft 310 and the inner side surface of the motor housing 100 to absorb vibrations and shocks .

That is, the damping unit 600 is provided only for damping vibration and impact of the ball bearings 510 disposed on the rear side as described above. However, it is most effective in terms of durability of the ball bearings 510, Damping means 600 is also provided between the outer ring of the ball bearing 510 disposed on the front side as shown in FIG 5 and the bearing mounting portion 110 of the motor housing 100 to absorb the vibration and impact of each ball bearing 510 .

The damping means 600 is installed along the circumferential direction of the inner circumferential surface of the bearing mounting portion 110 of the motor housing 100 and has a plurality of radially inwardly convex elastic bumps 620 spaced apart in the circumferential direction And one side of which is fixedly coupled to the bearing mounting portion 110 of the motor housing 100.

That is, the damping means 600 may be a bump foil used in an airfoil journal bearing. 3, the damping unit 600 may be formed in a thin foil plate shape so that the plurality of elastic bumps 620 may be spaced apart from each other, and the damping unit 600 may be formed on the bearing mount 110 of the motor housing 100 It can be inserted and fixed inside. A plurality of resilient bumps 620 which are inserted into the damping means 600 and are convex inward in the radial direction with the damping means 600 coupled to the inside of the bearing mounting portion 110 And may be coupled to the outer ring of the ball bearing 510 so as to be in close contact with the outer ring. Here, the damping means 600 is formed of a bent portion 610 bent radially outwardly on one side, and a slot of a radially outwardly concave shape is formed in the bearing mounting portion 110 of the motor housing 100, The bent portion 610 may be inserted to be inserted. In addition, the bearing mounting portion 110 may be formed in a concave shape radially outwardly and formed with concave grooves along the circumferential direction so that the damping means 600 may be inserted into the concave groove.

A plate-shaped thrust runner 311 is formed on the rear side of the ball bearing 510 disposed on the rear side of the rotation shaft 310 and perpendicular to the rotation axis 310. The front side surface of the thrust runner 311, An air foil thrust bearing 530 can be tightly coupled between the housing 100 and between the rear side surface of the thrust runner 311 and the motor housing 100, respectively.

4 and 5, the thrust bearing may be configured to support the axial load due to the pressure of the air during the rotation of the impeller 400. The rear ball bearing (not shown) The thrust bearing may be provided at the rear side of the thrust bearing. In this case, various types of thrust bearings can be used as the thrust bearings. For example, the thrust bearings can be airfoil thrust bearings 530. Thrust rollers 311 in the form of a disk are formed perpendicularly to the rotating shaft 310, A pair of airfoil thrust bearings 530 are provided on both sides of the motor 311 so that the airfoil thrust bearings 530 can be tightly coupled between the thrust runner 311 and the motor housing 100.

[Example 2]

FIG. 6 is a front sectional view showing an air compressor of a bearing vibration absorbing structure according to a second embodiment of the present invention, and FIG. 7 is a sectional view in the direction of BB 'of FIG.

As shown in the drawings, an air compressor 1000 of a bearing vibration absorbing structure according to a second embodiment of the present invention includes: a motor housing 100 having a hollow interior; A stator 200 provided inside the motor housing 100 and fixedly coupled to the motor housing 100; A rotor 300 provided inside the stator 200 and coupled to the rotating shaft 310; An impeller 400 coupled to the front of the rotary shaft 310; And a pair of journal bearings (not shown) disposed between the motor housing 100 and the rotary shaft 310 and spaced apart from the front and rear sides of the rotary shaft 310, 500); The journal bearing 500 disposed on the front side of the rotary shaft 310 is formed of a ball bearing 510 and the journal bearing 500 disposed on the rear side of the rotary shaft 310 is formed of an air And a foil journal bearing 520.

This is because the motor housing 100, the stator 200, the rotor 300 and the pair of journal bearings 500 are provided in the same manner as the first embodiment of the present invention, A ball bearing 510 is disposed on the front side and an air foil journal bearing 520 is disposed on the rear side.

Since the airfoil journal bearing 520 has a damping structure capable of absorbing vibrations and impacts itself, the airfoil journal bearing 520 is disposed between the radially outer surface of the airfoil journal bearing 520 and the bearing mounting portion 110 of the motor housing 100 Vibration and impact of the bearing can be reduced even if there is no separate damping means 600 in the bearing.

Thus, the air compressor of the bearing vibration absorbing structure of the present invention is capable of absorbing vibrations generated from the bearings and vibrations and shocks acting on the bearings, thereby improving the durability of the bearings.

Further, a damping means 600 interposed between the radial outer side surface of the ball bearing 510 disposed on the front side of the rotary shaft and the inner side surface of the motor housing 100 to absorb vibrations and shocks is further provided .

That is, as described in the first embodiment of the present invention, it is effective in terms of absorbing vibrations and shocks only in the journal bearings on the rear side. However, as shown in FIG. 9, And the damping means 600 may be provided between the bearing mounting portion 110 of the motor housing 100 and the vibration receiving portion 110 of the motor housing 100 to absorb vibrations and shocks of the respective ball bearings 510.

The airfoil journal bearing (520) includes a bearing housing (521) formed with a hollow (521a) in which the rotary shaft (310) is disposed, and both sides in the width direction are opened; A plurality of elastic bumps 522b formed inside the bearing housing 521 along the circumferential direction and convexed inward in the radial direction are spaced apart along the circumferential direction and one side of the elastic bump 522 is coupled to the bearing housing 521 A fixed bump foil 522; A top foil 523 formed inside the bump foil 522 and formed along the circumferential direction and having one side fixed to the bearing housing 521; . ≪ / RTI >

That is, the airfoil journal bearing 520 can be largely constituted by the bearing housing 521, the bump foil 522 and the top foil 523, and is formed in the circumferential direction along the inner circumferential surface of the bearing housing 521 in the bump foil 522 may be arranged in a dried form, and the top foil 523 may be arranged in a dried form inside thereof. At this time, the bump foils 522 are formed with a plurality of elastic bumps 522b spaced apart in the circumferential direction, and the elastic bumps 522b may be formed in a convex shape radially inward. The bump foil 522 is formed with a bent portion 522a having one end bent radially outwardly and the bent portion 522a is inserted into the slot 521b formed in the radially outer side of the bearing housing 521 Can be fixed. The top foil 523 is formed in a flat plate shape without bending, and the bending portion 523a may be formed radially outwardly on one side of the top foil 523 so as to be inserted and fixed in the slot 521b. In addition, the bearing housing 521 may be inserted into and coupled to the bearing mounting portion 110 of the motor housing 100.

A thrust runner 311 in the form of a plate perpendicular to the rotation axis 310 is formed on the rear side of the airfoil journal bearing 520 disposed on the rear side of the rotation shaft 310, An air foil thrust bearing 530 may be tightly coupled between the motor housing 100 and the motor housing 100 and between the rear side surface of the thrust runner 311 and the motor housing 100, respectively.

That is, the thrust bearing may be configured to support the axial load due to the air pressure during the rotation of the impeller 400, and the thrust bearing may be constructed as a rear airfoil journal A thrust bearing may be provided behind the bearing 520. [ In this case, the thrust bearings may also be various kinds of thrust bearings. For example, the thrust bearings may be airfoil thrust bearings 530. Thrust rollers 311 in the form of a disk are formed perpendicularly to the rotating shaft 310, A pair of airfoil thrust bearings 530 are provided on both sides of the runner 311 so that the airfoil thrust bearings 530 can be tightly coupled between the thrust runner 311 and the motor housing 100.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

1000: air compressor
100: motor housing 110: bearing mount
200: stator
300: rotor
310: rotational shaft 311: thrust runner
320: Magnet
400: impeller 410: impeller case
411: Inlet port 412: Outlet port
500: Journal bearing
510: Ball Bearings 520: Air Foil Journal Bearings
521: Bearing housing 521a: hollow
521b: Slot 522: Bump foil
522a: bent portion 522b: elastic bump
523: Top foil 523a:
530: Airfoil thrust bearing
600: damping means
610: bending section 620: elastic bump

Claims (8)

A motor housing having a hollow interior;
A stator installed inside the motor housing and fixed to the motor housing;
A rotor disposed inside the stator and coupled to a rotating shaft;
An impeller coupled to only the front of the rotary shaft; And
A pair of journal bearings coupled between the motor housing and a rotating shaft, the pair of journal bearings being rotatably supported by the rotating shaft and spaced apart from a front side and a rear side of the rotating shaft; , ≪ / RTI >
Wherein the journal bearings are formed of a ball bearing and disposed between a radially outer side surface of a ball bearing disposed on a rear side of the rotary shaft and the motor housing to be damped by vibration and shock,
The journal bearing on the front side of the rotary shaft is directly coupled to the bearing mounting portion and the rotary shaft of the motor housing,
Wherein the damping means comprises:
A bump foil which is installed along the circumferential direction of the inner circumferential surface of the bearing portion of the motor housing and has a plurality of radially inwardly convexed resilient bumps spaced apart from each other in the circumferential direction and one side of which is fixedly coupled to the bearing mounting portion of the motor housing, Wherein the air compressor has a bearing vibration absorbing structure.
delete delete The method according to claim 1,
A plate-shaped thrust runner is formed on the rear side of the ball bearing arranged on the rear side of the rotating shaft, and a plate-like thrust runner is formed perpendicularly to the rotating shaft. Between the front side of the thrust runner and the motor housing, and between the rear side surface of the thrust runner and the motor housing, And the foil thrust bearings are tightly coupled to each other.
delete delete delete delete
KR1020150115348A 2015-08-17 2015-08-17 Air compressor having a bearing vibration absorption structure KR101633673B1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108706838A (en) * 2018-07-28 2018-10-26 上海亚威环保科技有限公司 Medical waste water zero discharge treatment device and method
US10247237B2 (en) 2016-09-09 2019-04-02 Lg Electronics Inc. Rolling bearing and motor having the same
WO2019083238A1 (en) * 2017-10-23 2019-05-02 엘지전자 주식회사 Motor
KR102136831B1 (en) * 2017-10-23 2020-07-23 엘지전자 주식회사 Motor
KR20200125536A (en) * 2019-04-25 2020-11-04 엘지전자 주식회사 Motor assembly and manufacturing method thereof
US11431218B2 (en) * 2018-08-23 2022-08-30 Lg Electronics Inc. Motor and manufacturing method of the same
KR20220164892A (en) * 2021-06-07 2022-12-14 박창진 A turbo motor that engages two or more airfoil journal bearings and rotors into the air gap between the stator and the rotor

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KR20070012591A (en) * 2005-07-23 2007-01-26 삼성테크윈 주식회사 Air foil bearing
KR100937901B1 (en) * 2008-04-21 2010-01-21 한국과학기술연구원 Oil-free turbocharger assembly
KR20140135383A (en) 2013-05-16 2014-11-26 현대자동차주식회사 Air blower for fuel cell car

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JPH02146297A (en) * 1988-11-26 1990-06-05 Fanuc Ltd Turbo blower for laser
JP2001303964A (en) * 2000-04-24 2001-10-31 Ishikawajima Harima Heavy Ind Co Ltd Bearing structure for turbo charger
KR20070012591A (en) * 2005-07-23 2007-01-26 삼성테크윈 주식회사 Air foil bearing
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10247237B2 (en) 2016-09-09 2019-04-02 Lg Electronics Inc. Rolling bearing and motor having the same
US10801547B2 (en) 2016-09-09 2020-10-13 Lg Electronics Inc. Rolling bearing and motor having the same
WO2019083238A1 (en) * 2017-10-23 2019-05-02 엘지전자 주식회사 Motor
KR102136831B1 (en) * 2017-10-23 2020-07-23 엘지전자 주식회사 Motor
KR20200090675A (en) * 2017-10-23 2020-07-29 엘지전자 주식회사 Motor
KR102200110B1 (en) 2017-10-23 2021-01-11 엘지전자 주식회사 Motor
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US11608832B2 (en) 2017-10-23 2023-03-21 Lg Electronics Inc. Rotary drive for an impeller and motor assembly with gas and rolling bearings arranged in housing structure
CN108706838A (en) * 2018-07-28 2018-10-26 上海亚威环保科技有限公司 Medical waste water zero discharge treatment device and method
US11431218B2 (en) * 2018-08-23 2022-08-30 Lg Electronics Inc. Motor and manufacturing method of the same
KR20200125536A (en) * 2019-04-25 2020-11-04 엘지전자 주식회사 Motor assembly and manufacturing method thereof
KR102410220B1 (en) 2019-04-25 2022-06-17 엘지전자 주식회사 Motor assembly and manufacturing method thereof
KR20220164892A (en) * 2021-06-07 2022-12-14 박창진 A turbo motor that engages two or more airfoil journal bearings and rotors into the air gap between the stator and the rotor
KR102610711B1 (en) * 2021-06-07 2023-12-05 박창진 A turbo motor that engages two or more airfoil journal bearings and rotors into the air gap between the stator and the rotor

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